Class 3 national insurance contributions are voluntary and may be made either where no other contribution is due, or in addition to other contributions, in order to establish or maintain the contributor's entitlement to state benefits. Class 3 contributions are payable at a fixed weekly rate (see E8.402).
For an overview of Class 3 contributions, see E8.401.
When Class 3 contributions can be refunded
Any Class 3 contribution paid in error is to be repaid on application by the contributor made in writing or by such means of electronic communications as may be approved, within six years from the end of the year in which it was due to be paid1. For guidance on obtaining a repayment, see the GOV.UK website ('Claim a National Insurance refund').
If the contribution was paid in error, it would appear that there is no year for which it was due to be paid, and in any event the year for which it was
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Web page updated on 17 Mar 2025 13:35